Sounding component and piezoelectric speaker

Abstract

The embodiments of the present disclosure disclose a sounding component and a piezoelectric speaker, wherein the sounding component comprises at least one layer of conductive bracket and multiple layers of piezoelectric vibration unit. Each layer of conductive bracket is formed with at least one notch, and a layer of conductive bracket is connected between adjacent two layers of piezoelectric vibration unit so that the sounding component may emit sound through the notch. Thus, by setting conductive brackets with notches to determine the sound direction, it helps to meet the design requirements of piezoelectric speaker side sound output.

I/We claim: 
     
         1 . A sounding component, comprises:
 at least one layer of conductive bracket, each layer of the conductive bracket is formed with at least one notch; and   multiple layers of piezoelectric vibration unit, wherein a layer of the conductive bracket is connected between two adjacent layers of the piezoelectric vibration unit to allow the sounding component to emit sound through the notch.   
     
     
         2 . The sounding component according to  claim 1 , wherein each layer of the conductive bracket is formed into a U-shaped structure. 
     
     
         3 . The sounding component according to  claim 2 , wherein the sounding component comprises multiple layers of the conductive bracket, and the notches of adjacent two layers of the conductive bracket face in opposite directions. 
     
     
         4 . The sounding component according to  claim 1 , wherein each layer of the conductive bracket comprises two oppositely arranged strip-shaped connecting pieces, and the two connecting pieces are arranged at both ends of the piezoelectric vibration unit. 
     
     
         5 . The sounding component according to  claim 1 , wherein the piezoelectric vibration unit comprises two layers of conductive thin film and a piezoelectric thin film arranged between the two layers of conductive thin film. 
     
     
         6 . The sounding component according to  claim 5 , wherein the conductive bracket is connected to the corresponding conductive thin films through conductive adhesive. 
     
     
         7 . The sounding component according to  claim 5 , comprises two conductive sheets and a piezoelectric sheet arranged between the two conductive sheets;
 each conductive sheet is folded to form multiple layers of the conductive thin film;   the piezoelectric sheet is folded to form multiple layers of the piezoelectric thin film.   
     
     
         8 . The sounding component according to  claim 5 , wherein multiple convex parts are formed by arching on each layer of the piezoelectric vibration unit. 
     
     
         9 . The sounding component according to  claim 8 , wherein the convex parts on the adjacent two layers of the piezoelectric vibration unit are arranged in a staggered manner. 
     
     
         10 . The sounding component according to  claim 1 , wherein the piezoelectric vibration unit comprises a first piezoelectric ceramic, a second piezoelectric ceramic, a third piezoelectric ceramic, a metal substrate, and an elastic thin film stacked in sequence. 
     
     
         11 . The sounding component according to  claim 10 , wherein the first piezoelectric ceramic and the third piezoelectric ceramic are arranged with a first polarization direction, the second piezoelectric ceramic is arranged with a second polarization direction, and the first polarization direction is opposite to the second polarization direction. 
     
     
         12 . The sounding component according to  claim 11 , wherein electrode connecting ways of the adjacent two layers of the piezoelectric vibration unit are opposite. 
     
     
         13 . The sounding component according to  claim 10 , wherein the metal substrate extends to both sides in the first extending direction to form first extending parts;
 the elastic thin film extends to both sides in the first extending direction to form second extending parts;   the first extending parts and the second extending parts are sandwiched between two layers of the conductive bracket.   
     
     
         14 . The sounding component according to  claim 13 , wherein profiling grooves are recessed on the conductive bracket, the profiling grooves are matched with the first extending parts, and the first extending parts are embedded in the profiling grooves. 
     
     
         15 . The sounding component according to  claim 10 , wherein the elastic thin film extends to both sides in the second extending direction to form third extending parts, and the third extending parts are connected to the conductive bracket. 
     
     
         16 . The sounding component according to  claim 15 , wherein the two layers of conductive bracket located at the edge are enclosed along the end face to form blocking parts. 
     
     
         17 . A piezoelectric loudspeaker, comprises:
 a housing, wherein the housing is provided with a sound outlet; and   the sounding component of  claim 1 , wherein the sounding component is arranged inside the housing, and at least some of the notches are aligned with the sound outlet.   
     
     
         18 . The piezoelectric loudspeaker according to  claim 17 , wherein the housing is provided with an accommodating groove inside, and the groove wall of the accommodating groove opposite to the sound outlet is provided with a first through hole.